Overloaded. Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. (Inherited from TEnumerableBase<T>.)

Overloaded. Returns the only element of a sequence, or the specified default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. (Inherited from TEnumerableBase<T>.)

Overloaded. Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition. (Inherited from TEnumerableBase<T>.)

Overloaded. Returns the only element of a sequence that satisfies a specified condition or the specified default value if no such element exists; this method throws an exception if more than one element satisfies the condition. (Inherited from TEnumerableBase<T>.)

Overloaded. Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. The element's index is used in the logic of the predicate function. (Inherited from TEnumerableBase<T>.)